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Optical, Mechanical and Thermal Prop...

Brown, Charles Daryl, II.

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Optical, Mechanical and Thermal Properties of Superfluid Helium Drops Magnetically Levitated in Vacuum.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Optical, Mechanical and Thermal Properties of Superfluid Helium Drops Magnetically Levitated in Vacuum./
作者:	Brown, Charles Daryl, II.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	267 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-10, Section: B.
Contained By:	Dissertations Abstracts International81-10B.
標題:	Atomic physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27541467
ISBN:	9798607315986

Optical, Mechanical and Thermal Properties of Superfluid Helium Drops Magnetically Levitated in Vacuum.
Brown, Charles Daryl, II.

Optical, Mechanical and Thermal Properties of Superfluid Helium Drops Magnetically Levitated in Vacuum. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 267 p.

Source: Dissertations Abstracts International, Volume: 81-10, Section: B.

Thesis (Ph.D.)--Yale University, 2019.

This item must not be sold to any third party vendors.

The field of optomechanics studies the interactions between light and the motion of an object. One of the goals in this field is to generate and control highly non-classical motion of a massive mechanical oscillator. There has been progress in generating such non-classical motion via coupling the oscillator to a qubit, or by utilizing the non-linearity of single photon detection. However, interest still remains in generating non-classical motion directly via the optomechanical interaction itself. Doing so requires strong coupling between the light and the mechanical oscillator, as well as low optical and mechanical loss and temperature. The unique properties of superfluid helium (zero viscosity, high structural and chemical purity and extremely low optical loss) address some of these requirements.To exploit the unique properties of superfluid helium we have constructed an optomechanical system consisting entirely of a magnetically levitated drop of superfluid helium in vacuum. Magnetic levitation removes a source of mechanical loss associated with physically clamped oscillators. Levitation also allows the drop to cool itself efficiently via evaporation. The drop's optical whispering gallery modes (WGMs) and its surface vibrations should couple to each other via the usual optomechanical interactions. In this dissertation we demonstrate the stable magnetic levitation of superfluid helium drops in vacuum and present measurements of the drops' evaporation rates, temperatures, optical modes and surface vibrations. We found optical modes with finesse ∼40 (limited by the drop's size). We found surface vibrations with decay rates ∼1 Hz (in rough agreement with theory). Lastly, we found that the drops reach a temperature T≈330 mK, and that a single drop can be trapped indefinitely.

ISBN: 9798607315986Subjects--Topical Terms:

3173870
Atomic physics.
Subjects--Index Terms:

Helium

Optical, Mechanical and Thermal Properties of Superfluid Helium Drops Magnetically Levitated in Vacuum.
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500 $a Source: Dissertations Abstracts International, Volume: 81-10, Section: B.
500 $a Advisor: Harris, Jack.
502 $a Thesis (Ph.D.)--Yale University, 2019.
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520 $a The field of optomechanics studies the interactions between light and the motion of an object. One of the goals in this field is to generate and control highly non-classical motion of a massive mechanical oscillator. There has been progress in generating such non-classical motion via coupling the oscillator to a qubit, or by utilizing the non-linearity of single photon detection. However, interest still remains in generating non-classical motion directly via the optomechanical interaction itself. Doing so requires strong coupling between the light and the mechanical oscillator, as well as low optical and mechanical loss and temperature. The unique properties of superfluid helium (zero viscosity, high structural and chemical purity and extremely low optical loss) address some of these requirements.To exploit the unique properties of superfluid helium we have constructed an optomechanical system consisting entirely of a magnetically levitated drop of superfluid helium in vacuum. Magnetic levitation removes a source of mechanical loss associated with physically clamped oscillators. Levitation also allows the drop to cool itself efficiently via evaporation. The drop's optical whispering gallery modes (WGMs) and its surface vibrations should couple to each other via the usual optomechanical interactions. In this dissertation we demonstrate the stable magnetic levitation of superfluid helium drops in vacuum and present measurements of the drops' evaporation rates, temperatures, optical modes and surface vibrations. We found optical modes with finesse ∼40 (limited by the drop's size). We found surface vibrations with decay rates ∼1 Hz (in rough agreement with theory). Lastly, we found that the drops reach a temperature T≈330 mK, and that a single drop can be trapped indefinitely.
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653 $a Optomechanics
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